3 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Socorro | 1 | 8,183 | 8,678 | -0.99% | 566 | 14 | City |
| Rio Communities | 2 | 4,924 | 4,933 | -0.02% | 640 | 8 | City |
| Magdalena | 3 | 761 | 805 | -0.91% | 122 | 6 | Village |
Socorro is the largest city in Socorro County, with a population of 8,183.
Magdalena is the smallest city in Socorro County, with a population of 761.
There are 3 cities in Socorro County, New Mexico.